TWI378013B - Reversible valve assembly for a pneumatic tool - Google Patents

Description

1378013 IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to a pneumatic rotary tool, and more particularly to a pneumatic rotary tool having a reversible valve assembly for controlling airflow through The direction of the tool and the direction of rotation of the tool. [Prior Art] Pneumatic rotary tools are generally used in applications where it is necessary to rotate a fastener component (such as a screw or nut) in a forward or reverse direction to tighten or loosen the fastener component. Pneumatic rotary tools are advantageous because the pneumatic rotary tool can quickly rotate the fastener elements to tighten or loosen the fastener components. Some pneumatic tools are capable of imparting a large amount of torque to the fastener. This is especially desirable in automotive repair and industrial applications where it may be difficult to loosen the fastener or may require a large amount of torque to tighten the fastener. The pneumatic rotary tool typically includes a tool that is sized to feed the output member of the fastener (eg, a socket) and drive the air motor.

The air motor in turn drives the socket. Air typically flows to the motor via one of two passages. When air flows through the first passage, it drives the motor in the forward direction (usually tight). When the air stream (four) has two paths, it drives the motor in the reverse (normally relaxed) direction. One is used to direct the (IV) airflow to the first or second passage. Typically, the raft includes a directional passage to direct air to the desired passage and - to (4) the arm for moving the square (four) trajectory to the desired position. In many jobs / the arm is at a position from the tool (for example, on the trigger). Alternatively, a pair of f lateral extensions can be used to move the valve in US Patent No. 124699.doc 1378013 5'199, 460 (Geiger In the number (for example), air flows through the tubular bobbin to the forward supply or reverse supply. The rack and pinion system rotates the bobbin and aligns it with the desired one. The two arms (racks) are located on the bobbin (gear) On the opposite side, the desired arm can be forced into the housing to rotate the spool to the desired position. When the -arm is pressed into the housing, the opposing arm is moved out of the housing in a rearward direction. The arm is pressed into the housing to compete for the position of the spool. The disadvantage of the currently used valve is that the structure (e.g., the arm) used to move the cymbal typically protrudes outwardly from the tool, making it susceptible to unintentional contact or movement during operation. Therefore, there is a need to provide a pneumatic tool with a simple valve construction that is securely held in the desired operating position under normal operating conditions. SUMMARY OF THE INVENTION The present invention is directed to a pneumatic rotary tool. There is often included a housing, an output member supported by the housing for rotational movement relative to the housing, and a pneumatic motor disposed in the housing and operatively coupled to the f output member for driving the output member Rotating.- The inlet is provided in the housing for receiving the enthalpy air from the source of pressurized air to provide power to the motor. The passage in the housing directs pressurized air from the inlet to the air motor. a valve disposed in the passage for guiding the air in the forward direction to guide the air to the first position of the air motor and to direct the pressurized air of the passage A in the reverse direction to One of the rotational movements and translations between the second position of the powered power of the air motor includes an actuator supported on the outer casing for direct use in the rotational movement and translation of the outer casing. The motion system interconnects the actuator with the valve. The connection system includes a common common movement in the first direction for feeding 124699.doc 1378013 and a second direction substantially perpendicular to the first direction The first and second connector elements 0 of the relative sliding movement will be partially and partially pointed out hereinafter. [Embodiment] Referring now to the drawings and particularly to the drawings, generally A first embodiment of a pneumatic rotary tool in accordance with the present invention is shown in the drawings. The tool 1 is illustrated as an impact wrench and typically includes a housing (generally indicated at 3) having an axis 4 and a housing in the housing. a clutch case 5 before 3, an output member 7 extending forwardly away from the clutch case 5, and an end cover 9 mounted on the rear portion of the outer casing 3. The output member 7 is supported by the outer casing 3 for opposing the axis 4 relative to the outer casing Rotating movement. The output member 7 is illustrated as a square, but can be formed in different ways within the scope of the invention. Four threaded fasteners 1 (eg, screws) extend through the end cap 9 and the outer casing 3 into the clutch box 5, Tighten the tool components together. The tool assembly can be fastened together in different ways (for example within the scope of the invention by means of different fastener tools 1 further comprising a handle 11 extending downwardly from the outer casing 3, allowing the user to grasp and securely hold the tool 1 ° The clutch box 5, the end cap 9 and the grip 11 are all considered part of the housing 3 for the purposes of the present invention. The trigger 13 extends from the front of the grip 11 for activating the tool 1' and the air inlet 15 is defined by the grip The lower portion of the shank 11 is for receiving pressurized air from a source of pressurized air (not shown) to supply pressurized air to the tool 1 (as is known in the art). Referring now to Figure 2, the tool 1 includes a torque selector 17 'The torque selector 17 124699.doc 1378013

The garment is on the end cap 9 and is rotatable within the end cap for controlling the torque of the tool 1 by restricting the flow of air. In the illustrated embodiment, the torque selector 17 rotates within the end shield 9 between four discrete positions corresponding to the four torque settings. The function of the torque selector 17 is not described in detail herein, but is described in detail in the related art (IV) MW% number dzumisawa et al. The torque selector is not essential to the practice of the present invention, and the torque selector constructed in a different manner can be used in the mouthpiece of the present invention (see, for example, Figure 11 illustrating a second embodiment of the present invention, wherein the torque selector The outer portion of 117 is shaped differently). Referring to Figure 3, a venting port 19 is defined in the lower portion of the grip u adjacent the air inlet 15. The exhaust port 19 includes a diffuser 21 for directing the exhaust gas away from the user and preventing foreign matter from entering the exhaust port 19 when the exhaust gas exits the tool.

The air flow through the passage in the outer casing 3 of the tool 1 is generally indicated by line A in Figures 3, 9B and 10B. Along the path of line A, pressurized air is first received in the tool 1 via the air inlet 15, which is more specifically defined by the fitting 23 which is used to connect the tool 1 to an air hose as known in the art and Pressurized air source (not shown). After the inlet 15, the air is biased by a spring biasing valve 25 which can be opened by pulling the trigger 13. The detailed construction and operation of the tilt valve 25 will not be discussed herein, as its design is well known in the related art. The air is then passed to a selector valve assembly (generally indicated at 27) which is located in the outer casing 3 directly above the trigger 13. As shown in more detail in Figures 4-8, the selector valve assembly 27 includes a narrowly actuated 124699.doc 1378013 pin 34 having first and second ends 34a, 34b (respectively) and a longitudinal axis 35, which Operatively coupled to the first valve member (generally indicated at 31) by the shaft 36 for rotatably moving the valve member in the second valve member (generally indicated at 33), the second valve member being fixed Position in the rear end of tool 1 (Figure 3). The first valve member 31, the second valve member 33, and the shaft 36 can be broadly referred to as "valve" and the actuation pin 34 can be broadly referred to as "actuator". Shaft 36

A projection 36a (broadly, a rod) in the slot 37 in the pin 34 is connected to the pin 34 (the projection and the slot can be broadly referred to as a "connector element") such that the shaft 36 The longitudinal axis 38 (Fig. 5) is generally perpendicular to the longitudinal axis 35 of the pin 34. As best seen in Figures 9A and 10A, the projection 36a is positioned off-center and thus away from the axis 38 of the shaft 36. The slot 37 is generally located below the longitudinal axis 35 of the pin 34 such that movement of the pin in the direction of its longitudinal axis 35 produces rotational movement of the shaft 36 about the axis 38. The projection 36a moves relative to the projection lateral assembly about the axis 38 for movement with the slot 37 and the pin 34. The vertical extent of the slot 37 allows the projection 36a to slide relative to the pin 34 in the slot such that the slot and projection are not perpendicular to the projection.

The rotary motion moves together. Therefore, the projection 36a and the slot 37 form an inactive motion connection in the first embodiment. The shaft 36 is coupled to the first jaw member 31 at an air opening 39 (Fig. 6) in the valve member. The semi-cylindrical finger 41 of the stem 36 is nested in the air opening 39 such that the flat surface of the finger abuts against the bottom surface of the flat deflector 45 of the first valve member 31 (see also Figure 9B and Figure 曰) The piece 41 is smaller than the air opening 39 such that air can still flow through the opening. The opening 42 in the finger receives the cylindrical extension 44 of the first valve portion (Fig. 6) for fastening the finger to the valve By this connection, the rotational movement of the shaft 36 collectively rotates the first member η. The first valve 124699.doc 1378013 The member and the shaft 36 can be formed as a whole within the scope of the present invention. The actuating pin 34 is generally positioned above the trigger π for easy access. The pin 34 extends through the passage 43 through the outer casing 3 to protect it from inadvertent contact during operation. Referring additionally to Figures 9A-10B, the pin 34 can be Moving in a passage 43 between a first position (Fig. 9A) in which the first end 34a extends outwardly from the passage (Fig. 9A) and a second position (Fig. 1) in which the second end 34b extends outwardly from the passage. In the first position, the valve assembly 27 is in a reverse operating position (Fig. 9B). The flat deflector 45 of the member 31 "rotates counterclockwise about the axis (as viewed in Figure 9B) such that air entering the second valve member 33 via the air opening 39 of the first valve member is guided through the second member 33 The first material 47. When the pin 34 is in the second position, the valve assembly η is in the - forward operating position (Fig. 10A). The β deflector 45 rotates clockwise about the axis % (as observed in Fig. _), so that The air of the second valve member 33 is directed by the deflector 45 through the first side of the second valve member, the second valve member, the additional top ram 5G, which provides an exit passage for the exhaust from the motor. It should be noted in Figure 3 The first » , . c ^ valve element 31 is shown in an intermediate position (between the reverse operating position and the forward operating position). Continued through Figure 3, Figure and Figure + Α, one ...s and the air path of the tool 1 in the figure 1 C pass through the selector valve assembly 27, the passage 53 or the second air passage 55 (depending on the position of the first air direction), and the second: Where the component 31 and the deflector 45 are _. in _, empty; by: the guide path 53 and through the torque selection side (four) and The motor is driven in an operational direction, entering the motor 57 to provide power 124699.doc •11- (as will be apparent) in the reverse rotation of the output member 7. In Figure 10B, the air is directed through the second The side turns 49 and the second passage 55 are directly transmitted to the motor 57 to drive the motor in a forward operating direction. The pneumatic rotary motor 57 (as illustrated in Figure 3) is of a type known to those skilled in the art and includes a rotor 59 and A plurality of blades 61. A pneumatic rotary motor similar to that described in detail in U.S. Patent No. 6, '796 '386. Air enters the motor 57 and expands against the blades 61, which in turn rotates the rotor 59. The support shaft 63 extends from the rear end of the rotor 59, and the spline shaft 65 extends from the front end of the rotor. The support shaft 63 is fitted into the ball bearing 6G, and the ball bearing 6 is mounted on the end cap of the motor 57. The spline shaft 65 has a spline portion... and a smooth portion 6. The smoothing material 65b is sleeved with a ball bearing 6q. The ball bearing (9) is mounted in the front end cap 67a of the motor 57, and the spline portion... extends beyond the front end cap 67a and squashes The impact clutch received in the clutch case 5 (generally indicated at 69). The spline portion 65a fits into the slotted hole of the impact clutch to allow for common movement. The splines (four) and the cut (four) of the rotor 59 extend generally along the longitudinal axis 4 of the outer casing 3, and the two sets of ball bearings (10) allow the rotor μ Rotating freely in the motor 57. When the S air travels through the air motor 57, it drives the spline 姊, the key shaft 65 enters (4) the dynamic impact clutch (4) and the output member. As known in the art, the impact clutch 69 will The high cranking energy of the motor 57 is converted into a discrete high torque impact torque on the auxiliary member 7. Since the high torque shock is limited in duration, when the output member 7 is given a greater torque than is possible to continuously apply a high torque. When the torque is applied, the operator can hold the tool and the impact tool should have a high torque (4), such as tightening or loosening the fasteners that require high torque 124699.doc 1378013. The impact clutch 69 is familiar to those skilled in the art. And not further described herein. The air consumed by the motor 57 is exhausted via the discharge opening 73 in the motor and via the bore 50 of the second valve member 33. The air consumed is then directed through the outer casing. The orifice (not shown) of 3 is removed from the tool nip 19 to the vent 19 in the grip. This is well known in the art. Figures 11 through 16B illustrate a second embodiment in accordance with the present invention. The tool of the embodiment. The tool is generally indicated at 101, and the portion of the tool corresponding to the portion of the tool 1 of the first embodiment (Fig. 10B) is added by the same reference numeral "1〇〇" As indicated in Figures 11 and 12, the tool ι 〇 1 of this embodiment is generally similar to the tool 1 of the first embodiment. However, in this embodiment, the selector valve assembly 181 is modified (Figure 12 To Figure 14). The selector valve assembly 181 is located behind the tool 1〇1 (generally below the end cap 109 of the tool. Referring additionally to Figures 13 and 14', the selector valve assembly 181 includes two push buttons i87a, 187b, The two pushers are juxtaposed in parallel relationship and operatively coupled to the first valve member (generally indicated at 131) for rotatably moving the valve in the cylindrical second valve member (generally indicated at 133) a second valve member is fixed in the outer casing 103 (Fig. 12). The first valve member 13 and the second valve portion Piece 133 can be broadly referred to as "valve" and the push red 187a, 187b can be broadly referred to as ••actuator". push 187a, 187b by pin 189 (broadly, "protrusion";) connected to the main surface 188 of the first valve member 131, the pins 189 being associated with the first valve member and extending from the opening 191 in the first valve member 13 1 and entering the narrowness of the respective push buttons 187a, 187b In the slot 193. The slot 193 allows the push buttons 187a, 187b to move vertically relative to the 124699.doc • 13-1378013 housing 103 and produces a rotational movement of the first valve member 131 by a small amount of horizontal movement of the receiving pin 189 (when the first A valve member 13i is generated when rotated by an inactive motion connection). It should be understood that other types of sliding invalid motion connections may be used within the scope of the present invention. The push buttons 187a, 187b move in a direction generally parallel to each other and are moved substantially perpendicular to the longitudinal axis 10.4 of the outer casing 103. As shown in Fig. 15A and Fig. 16A, the push button 187a, 187b of the valve assembly ι81

It is positioned directly below the end cap 109 to protect it from inadvertent contact during operation. The portions of the pusher 187a, 187b and the second valve member 133 after the end cover 1〇9 are illustrated by broken lines in these figures. The push buttons 187a, 187b are movable in the vertical direction such that the first push button 1873 or the second push button 18 extends slightly below the end cover 109 and the other push button is generally behind the end cover. In Figs. 15A and 15B, the first push button 18 is below the end cap 1 〇 9 and the valve assembly 181 is in a forward operating position. The first valve component of the assembly 181

The deflector 145 (similar to the deflector 45 of the first embodiment) rotates counterclockwise from a horizontal position to an angle of about 45 degrees such that an air opening through the first valve member 131 (similar to the first valve member of the first embodiment) The air opening 39 of the air opening 39) enters the second valve member 133, and the air is deflected by the deflector through the first side 埠 147 of the second valve member and reaches the first air passage 153 in the route to the motor 157 (Fig. 15B). Unlike the first embodiment, since the arrangement of the air motor (not shown) is different, the configuration produces the front and back operations of the guard. To change the operation of the tool 101 to the reverse operating position, the first push button 187a is pressed upward, which rotates the first valve member i3i, and moves the second push button (4) downwardly out of the housing 1〇3 (Fig. 16A). The deflector 145 is rotated clockwise 124699.doc 1378013 horizontally to an angle of about 45 degrees such that air entering the second valve member 133 is biased through the second side 埠149 of the second valve member and to the second air passage 155 ( Figure 16B). By pushing the second push button 18 7b up, the tool can be configured again for forward operation. Also in this embodiment, and as shown in Fig. 12, the consumed air from the motor 157 is discharged to the bottom of the motor 157 via the discharge opening 195. The consumed air is then directed from the tool 101 through an orifice (not shown) in the housing 103 to the vent 119 in the handle 1^. In all other aspects, the operation of the tool 10 1 of this embodiment is substantially the same as that described for the tool 1 of the first embodiment. Referring to Figures 17 through 23, another embodiment of the present invention is a pneumatic rotary drill (generally indicated at 201). The drill includes a generally indicated housing at 203 which includes a handle 2〇5 for the user to hold and operate the drill 201. The upper portion of the outer casing 203 supports a drive mechanism (including a pneumatic motor 209) generally indicated at 207 for rotating the output member 2丨3 (e.g., the drill is lost) about the axis of rotation Ai, the output member 213 from the outer casing The upper part extends forward. The output member 213 has a hexagonal groove 214 for receiving a drill bit (not shown). Similar to the tool of the above embodiment, the pneumatic motor 2〇9 of the pneumatic drill 201 is adapted to rotate clockwise to impart forward or clockwise rotation to the output member 213, or to rotate counterclockwise to impart reverse or counterclockwise output to the output member. Rotate. The drive mechanism 207' by which the motor rotates and imparts rotation to the wheeling member is well known in the art and will not be described in detail herein. The air motor 209 is driven by pressurized air. The pressurized air is delivered from a pressurized fluid source (not shown) to the air motor via a series of fluidly connected air passages in the housing 203. The inlet passage 215 in the grip 205 can be connected to a source of pressurized air by fastening a hose (not shown) to the connector 217 at the bottom of the grip. Referring to Fig. 1, a tilt valve 219 (generally shown) similar in construction and operation to the tilt valve of the previous embodiment is disposed between the inlet passage 215 and the other air passages in the drill 2〇1. Other suitable valves can be used within the scope of the present invention. The plunger 221 extending rearward from the trigger 223 actuates the opening of the tilt valve 219. Pressing (pulling) the trigger 223 causes the plunger 221 to move linearly rearward along its longitudinal axis a2 such that the free end of the plunger contacts the stem 227 of the valve 219 and forces the valve out of its base 229 to open the valve, causing pressurized air to flow to Air motor 209. Referring to Figures 18 through 23, the reversible valve assembly generally indicated at 233 is downstream of the tilt valve 219 and upstream of the air motor 209 for directing pressurized air entering the valve from the inlet passage 215 to the forward direction. The drive air passage 23 5A drives the motor clockwise (Fig. 21) or into the reverse drive air passage 235B to drive the motor counterclockwise (Fig. 2A). As best seen in Figures 18 and 22, the reverse valve assembly 233 includes a generally cylindrical rotor 237 (broadly, a valve assembly) received in a cylindrical sleeve 239 (broadly, a valve body). The tube 23 9 is fixedly received in the outer casing 203. The plunger 221 (Fig. 18) is slidably received in the axial opening 241 of the rotor 237 such that the free end edge of the plunger extends through the rotor in the sleeve 23 9 and the rear inlet bore 243 where the plunger is free The end engages the rod 227 of the tilt valve 219. For reasons discussed below, the rotor 237 is rotatable about an axis of rotation A3 that is substantially coincident with the longitudinal axis of the plunger 221. A beak ring 245 (Fig. 19) received in a circumferential slot in the outer surface of the plunger 221 sealingly engages the inner surface of the rotor 237 defining the axial _ passage 241 124699.doc -16 · 1378013 to prevent air from passing through The axial passage does not leak out of valve 23 3 . Thus, the plunger 221 is sealingly and slidably engageable with the rotor 23 7 . Another collar 246 (Figs. 18 and 19) received around the rear of the sleeve 239 sealingly engages the outer casing 203' to prevent air from leaking between the sleeve and the outer casing. Referring to Fig. 19, the rear portion 247 of the rotor 237 sealingly tampers the inner surface of the sleeve 239 so that pressurized air entering the valve 233 from the inlet port 243 cannot flow between the rotor and the sleeve. A slot 249 (Figs. 19 to '23) extends longitudinally from the rear end of the rotor 237 along the upper portion of the rotor. Selective rotation of the rotor 237 (as will be described) radially aligns the slots 249 with one of the first and second outlet ports 251A, 25 1B_ in the sleeve 239, respectively. The first outlet port 251a is in fluid connection with the forward drive path 235, and the second port port 251]8 is in fluid connection with the rearward drive path 235B. When the rotor slot 249 is radially aligned with the first outlet bore 25iA (Fig. 21), the valve 235 is in the forward drive configuration whereby the first outlet port is opened and the second outlet port 251B is closed. In the forward drive configuration, the pressurized air entering the valve 235 via the inlet port 243 is separately directed to the forward drive air passage 235A to drive the motor and, in turn, drive the output member 23 clockwise. Similarly, although the rotor slot 249 is radially aligned with the second outlet 埠 25 ΐ β (in the figure, the valve 235 is in a reverse drive configuration and the second outlet 埠 is open and the first outlet 埠 25 1A is closed. In the configuration, the pressurized air entering the valve 235 via the inlet port 243 is separately directed to the reverse drive air path 235B. The inter-driver configuration is performed between its forward drive configuration and its reverse drive configuration. The selective rotation of the rotor 237 is actuated by a linear translation of a pin or inference 255 (broadly, 124699.doc -17 1378013 actuator). The push button 255 is generally rod-shaped and generally front of the handle 205 The trigger 223 is then slidably received in the housing 203. The push button 255 is slidable along a generally linear actuation axis A4 (Figs. 20 and 21) which is generally transverse (e.g., substantially perpendicular) to the rotation of the rotor 237. The axis A3. More specifically, the push button 255 can be at a first position (Fig. 21) in which the right end 257A of the push button projects outwardly from the right side 259A of the outer casing 203 (Fig. 21) and the left end 25 7B of the button from the left side 259B of the outer casing. Move between the second laterally protruding position (Fig. 20). See Figure 22. And Figure 23, the connection system, more specifically the inactive motion connection system (generally indicated at 263), operatively connects push button 255 to rotor 237 of valve 233 such that the push button is linear along actuation axis A4. The movement imparts rotational movement to the rotor. The attachment system includes a sliding plate 265 that is secured in the slot 267 of the push button 255 and extends generally downwardly from the actuation axis A4. The stem 271 of the attachment system 263 The front portion 273 extends forwardly from the rotor 23 7 and is received in the slot 275 of the sliding plate 265. The slot 275 extends perpendicularly from the bottom surface of the plate 265 generally perpendicular to the actuation axis A4 and is sized and shaped to allow The rod 271 is vertically moved or slid therein. Therefore, when the slide plate 265 is coupled to the rod 271, the translation of the push button 255 and the slide plate 265 is converted into an angular movement of the rod 271 and an angular movement of the rotor 237 about its rotation axis A3. In the illustrated embodiment, the right end 257A of the push button 255 is used to slide the button to the left to rotate the rod 271 and the rotor 237 counterclockwise to the forward drive position 'the slot 249 and the first outlet port 251A in the rotor. Forward drive The gas passage 235A is radially aligned. Conversely, the left end 257B of the push button 255 is slid to the right to rotate the rotor 237 clockwise to the reverse drive position 124699.doc -18· 1378013, wherein the slot 249 in the rotor Aligned with the second outlet port 25 1B and the reverse drive air passage 235B. Referring to Figures 18 and 19, the selected passage of air from the forward drive and reverse drive air passages 235A, 235B enters the air motor 2〇9 After rotating the air motor to drive the drive mechanism 207, the air exits the air motor via the exit opening 279 in the motor and enters the discharge passage 281 in the grip 2〇5 of the drill 2〇1. The air is fluidly connected to the valve 233 of the discharge passage before exiting the discharge passage 281 to the atmosphere. The valve sleeve 239 has an upper discharge opening 285A to allow air to flow from the discharge passage 281 into the valve 233 and has a lower discharge opening 285B to allow air to exit the valve and re-enter the discharge passage. The intermediate portion 287 of the rotor 273 disposed between the sleeve 239 and the lower discharge opening 285a, 285B has a reduced outer diameter that is smaller than the inner diameter of the sleeve to allow air to flow from the upper discharge opening. Pass through the middle section and exit via the lower discharge opening. After passing through the valve 233 and re-entering the discharge passage 281, the air passes through the diffuser 289 at the bottom of the grip 205 and enters the atmosphere. Other ways in which Guna exits the exhaust of the air motor are within the scope of the present invention. When introducing elements of the present invention or its preferred embodiments, the word "and" is intended to mean the presence of one or more elements. The term "includes" ", "includes" and "has " 'And means that there may be additional components in addition to the listed components. All the problems contained in the above description and shown in the drawings are intended to be interpreted in an illustrative and non-limiting sense, without departing from the scope of the invention. . 124699.doc • 19· 1378013 [Simplified Schematic] Circle 1 is a side view of a pneumatic rotary tool according to a first embodiment of the present invention; FIG. 2 is an enlarged partial rear view of the tool; Figure 4 is a perspective view of the valve assembly of the tool; Figure 5 is an exploded perspective view of Figure 4; Figure 6 is a perspective view of the first valve component of the valve assembly;

Figure 7 is a front elevational view of the second valve member of the valve assembly; Figure 8 is a cross-section of the second valve member taken along line 8-8 of Figure 7. Figure 9A is a partial elevational view of the tool, valve assembly The pin and the portion of the projection are shown by the hidden line and the valve assembly is in the reverse operating position; Figure 9B is a partial rear view of the tool with the end cap partially disengaged from the valve assembly and the valve assembly is reversed In the operating position; Figure 1A is a front view of Figure 9A with the valve assembly in the forward operating position;

Figure 10B is a front elevational view of Figure 9B with the valve assembly in a forward operating position; Figure 11 is a partial rear elevational view of the pneumatic tool in accordance with a second embodiment of the present invention, showing a vertical cross-section of the tool; Figure 13 is Figure 11 Figure 14 is an exploded perspective view of the tool; Figure 15A is a partial rear view of the tool of Figure 11 corresponding to the forward operating position of the valve assembly; Positioned with the end cap and the inter-assembly portion off Figure 15B is a partial rear view 124699.doc -20· 1378013 of Figure 15A; Figure 16A is a front view of Figure 15A, the valve assembly is positioned to correspond to the inter-assembly Figure 16B is a partial front elevational view of Figure 16A with the end cap partially detached from the valve assembly, and Figure 17 is a perspective circle of a pneumatic rotary drill in accordance with another embodiment of the present invention,

Figure 18 is a section of the sword taken along the length of the drill; Figure 19 is an enlarged partial view of Figure 18; Figure 20 is a cross-sectional view of the plane including the line 20-20 of Figure 18, the reversible valve The configuration is configured to direct air to drive the air motor counterclockwise. Figure 21 is similar to Figure 20, the reversible jaw assembly is configured to drive the air motor with a bad clock; Figure 22 is an enlarged exploded perspective view of the reversible valve assembly; An enlarged perspective view of the 23 Series reversible valve assembly.

Corresponding reference numerals are used throughout the drawings. [Main component symbol description] The figure indicates the corresponding parts. 1 Tool 3 Housing 4 Axis 5 Clutch case 7 Wheeling part 9 End cap 10 Threaded fastener 124699.doc • 21· 1378013 11 Grip 13 Trigger 15 Air inlet 17 Torque selector 19 Exhaust port 21 Diffuser 23 Fitting 25 Spring biased tilt valve 27 selector valve assembly 31 first valve member 33 second valve member 34 actuating brocade 34a first end 34b second end 35 longitudinal axis 36 shaft 36a projection 37 slot 38 longitudinal axis 39 air Opening 41 finger 42 opening 43 passage 44 extension 124699.doc -22· 1378013

45 deflector 47 first side 埠 49 second side 埠 50 top 埠 53 first air passage 55 second air passage 57 pneumatic rotary motor 59 rotor 60 ball bearing 61 blade 63 support shaft 65 spline shaft 65a spline portion 65b smooth Portion 67a Front end cap 67b Rear end cap 69 Impact clutch 71 Slotted hole 73 Discharge opening 101 Tool 103 Housing 104 Longitudinal axis 109 End cover 111 Grip 124699.doc -23- 1378013 117 Torque selector 119 Exhaust port 131 First valve Component 133 Second valve member 145 deflector 147 First side 埠 149 Second side 埠 153 First air passage 155 Second air passage 157 Motor 181 Selector valve assembly 187a ' 187b Push button 188 Main surface 189 Pin 191 Opening 193 Slot 195 Discharge opening 201 Pneumatic rotary drill 203 Housing 205 Grip 207 Drive mechanism 209 Air motor 213 Output member 214 Square slot. 24· 124699.doc 1378013 215 217 219 221 223 227 229 233

235A 235B 237 239 241 243 245

246 247 249 251A 251B 255 257A 257B Inlet Access Connector Tilt Valve Plunger Flip Rod Base Reversible Valve Assembly Valve Forward Drive Path Rear Drive Path Rotor Bushing Axial Opening / Axial Passage Rear Entrance 埠 0 Ring 0 Ring rear slot first exit 埠 second exit 埠 pin / push button right end left end 124699.doc •25· 1378013 259A right 259B left side 263 invalid motion connection system 265 sliding plate 267 slot 271 rod 273 . front 275 slot 279 Exit opening 281 discharge passage 285A upper discharge opening 285B lower discharge opening 287 intermediate portion 289 diffuser A line Αι rotation axis A2 longitudinal axis a3 rotation axis A4 actuation axis 124699.doc 26-

Claims (1)

1378013 — Patent Application No. 096,134,932 Patent Application Replacement (March 99) X. Patent application scope: 1. Pneumatic rotary-housing; tool comprising an output member 'supported by the outer casing for relative Rotating the housing; the oxygen motor is placed on the housing and operatively coupled to the output member for driving the rotation of the output member; and in the outer population, the a source of pressurized air receives pressurized air to power the motor; "a passage in the peripheral is used to direct the pressurized air from the population to the air motor; one has a longitudinal axis and is disposed a valve in the passage for guiding the pressurized air in the passage in a direction-to-direction to a first position to power the air motor and - directing the pressure in the passage in a reverse direction The air is rotated about the longitudinal axis between the second position that provides power to the pneumatic motor, and the one of the translational movements along the longitudinal axis a revelation on the outer casing, which is used to rotate the other of the outer casing relative to the outer casing, and to interconnect the actuator with the valve Connector The connector includes first and second connector elements, at least one of the first and the second connector elements including a crank from one of the valves and the cylinder a* The connector elements are engaged for movement generally in a direction of a younger brother and relative movement in a direction substantially perpendicular to the first direction of the first direction - 124699-990316.doc. 2 requesting a pneumatic rotary tool 'where the first connector component is s buckled, and the second connector component includes a slot in which the rod is received. A pneumatic rotary tool of claim 2, wherein the rod is associated with the valve and the slot is associated with the actuator. 4. The pneumatic rotary tool of claim 3, wherein the slot extends generally perpendicular to the longitudinal axis of the valve. 5. The pneumatic rotary tool of claim 3, wherein the valve is mounted for rotational movement about the longitudinal axis and the actuator is mounted for translation. 6. The pneumatic rotary tool of claim 5 wherein the rod projects axially from one of the axially facing ends of the valve and is eccentric with the longitudinal axis of the valve. 7. The pneumatic rotary tool of claim 6, wherein the actuator comprises a pin that extends generally transverse to the outer casing and generally perpendicular to the longitudinal axis of the valve. 8. The pneumatic rotary tool of claim 7, wherein the pin includes first and second sub-ends. The first end of the pin protrudes outside the outer casing when the motor is operated in the forward direction, and the pin The second end projects beyond the outer casing when the motor is operated in the 3 reverse direction. 9. The pneumatic rotary tool of claim 1, wherein the actuator comprises a first push button. A pneumatic rotary tool of claim 9, wherein the actuator further comprises a push button to adjust the valve to move the valve from the first position 124699-990316.doc 1378013 to the second Location, and 兮筮_4A * , . The brother infers that the valve is adapted to move the valve from the second position to the first position. η. A pneumatic rotary tool of claim π), wherein the invalid motion linkage system includes a projection for each of the push buttons and a slot. a pneumatic rotary tool of the claim " wherein the projections are associated with the valve, and each of the first push button and the second push button has a receiving one of the projections Do not protrude the slot. 13. The pneumatic rotary tool of claim 1 (), wherein the first push button is juxtaposed with the second push button at a rear end of the housing. 14. The pneumatic rotary tool of claim 1 wherein the chamber includes a flat deflector for directing flow from the inlet through the valve in the passage, the deflector directing the air in a first direction and a first Flowing in one of the two directions, the air flowing in the [direction causes the motor to operate in the front: direction] and the air flowing in the second direction causes the motor to operate in the reverse direction. 15. The pneumatic rotary escort of claim 14, wherein the actuator is mounted for translation' and the deflector is properly used. The mouth is mounted for rotation of the longitudinal axis of the valve, and the oscillating translation of the actuator produces the rotational movement of the deflector. 16: The pneumatic rotary tool of claim 1, wherein the reading comprises a first reading portion and a second valve member, the first valve member being rotatably received in the :: component for use in the first position A square turn movement is performed between the second position and the second position. 17. The requesting item-like pneumatic rotary tool, wherein the room further comprises 124699-990316.doc 1378013. The actuator is operatively coupled to the first inter-part 18. The pneumatic rotary tool of claim 17 wherein The shaft includes: a protrusion===including a slot. The slot receives the protrusion for moving, and shifting the actuation of the actuator to the rotation of the shaft to further move the shaft and the first The valve member is compliant such that rotation of the shaft collectively rotates the fingers of the first valve member. ° 19. The pneumatic_tool of claim 18, wherein the finger of the shaft encloses α ' and the first valve member includes an extension portion, the finger member constituting the first valve member The opening receives the extension and secures the clamp to the first valve member. 20. The pneumatic squirrel-like stalking tool of claim 16, wherein the actuator comprises operatively coupled to the first component m pure, the first push button adapted to the first component Moving from the first position to the second position and increasing the second push surface, the state is adapted to move the first valve member from the second position to the first position. 21. The pneumatic rotary tool of claim 20, wherein the invalid motion connection system includes a protrusion for each of the subtractions and a slot that is associated with the first component and the Each of the first push button and the first push button has a receptacle for receiving the respective protrusions for operatively connecting the turns to the slot of the first valve member 22 The pneumatic rotary tool of the requester further includes a plunger slidable to actuate the selective opening and closing of the person σ to select a pressure to introduce pressurized air into the passage, wherein the valve Optionally, the plunger is selectively rotated about an axis of rotation between the first position and the second position of 124699-990316.doc 1378013. 23. The pneumatic rotary tool of claim 26, wherein the first connector member includes a sliding member that extends outwardly from the actuator and has an axis of actuation substantially perpendicular to the actuator And an extended slot, and wherein the second connector component includes a rod extending outwardly from the valve and received in the slot of the sliding member. 124699-990316.doc